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Problem: Linked List Cycle III

Medium
30 min
Explore the technique of using fast and slow pointers to detect cycles in linked lists. Understand how to determine the cycle length or confirm the absence of a cycle. This lesson helps you apply pointer traversal methods to solve problems involving linked list cycles and their properties.

Statement

Given the head of a linked list, determine the length of the cycle present in the linked list. If there is no cycle, return 0.

A cycle exists in a linked list if there is some node in the list that can be reached again by continuously following the next pointer.

Constraints:

  • The number of nodes in the list is in the range [0,104][0, 10^4].

  • 105-10^5 \leq Node.value 105\leq 10^5

Problem
Ask
Submissions

Problem: Linked List Cycle III

Medium
30 min
Explore the technique of using fast and slow pointers to detect cycles in linked lists. Understand how to determine the cycle length or confirm the absence of a cycle. This lesson helps you apply pointer traversal methods to solve problems involving linked list cycles and their properties.

Statement

Given the head of a linked list, determine the length of the cycle present in the linked list. If there is no cycle, return 0.

A cycle exists in a linked list if there is some node in the list that can be reached again by continuously following the next pointer.

Constraints:

  • The number of nodes in the list is in the range [0,104][0, 10^4].

  • 105-10^5 \leq Node.value 105\leq 10^5